128549167 has 2 divisors, whose sum is σ = 128549168. Its totient is φ = 128549166.

The previous prime is 128549147. The next prime is 128549173. The reversal of 128549167 is 761945821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128549167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128549107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64274583 + 64274584.

It is an arithmetic number, because the mean of its divisors is an integer number (64274584).

Almost surely, 2^128549167 is an apocalyptic number.

128549167 is a deficient number, since it is larger than the sum of its proper divisors (1).

128549167 is an equidigital number, since it uses as much as digits as its factorization.

128549167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 128549167 is about 11337.9525047515. The cubic root of 128549167 is about 504.6881281905.

The spelling of 128549167 in words is "one hundred twenty-eight million, five hundred forty-nine thousand, one hundred sixty-seven".